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Article #1210

Re: WANTED again:64bits(double long) arthmetics

#1210
From: Duncan Murdoch
Date: Wed, 02 Sep 1992 02:13
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In article <1992Sep1.053802.3664@sparc4.ncu.edu.tw> cs8023@ee21.ncu.edu.tw (ee76536) writes:
>Hi, all assembly lang experters:
>
>I recently search a fast 64bit (double long) arthmetics,
>if you have any idea on which books/documents/tools, please inform
>me, thanks anyway.

That's a type supported in hardware in the 80x87 coprocessors.  I don't 
think all of the basic integer operations are provided, but they shouldn't 
be hard to write if you use the FPU instructions.  Look up those with 
mnemonics FIxxx for integer support, and remember that internally, 
everything is done in floating point - so you might need some FRNDINT 
instructions if you don't save intermediate values to memory.

In Turbo Pascal this is called the Comp type, in the Intel 486 manual, it's 
called a long integer.  Your compiler could call it anything.

Duncan Murdoch
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From: dmurdoch@mast.queensu.ca (Duncan Murdoch)
Subject: Re: WANTED again:64bits(double long) arthmetics
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Date: Wed, 2 Sep 1992 02:13:31 GMT